# Nutrilean (Irvingia gabonensis)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/nutrilean
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-30
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Irvingia gabonensis extract, African wild mango seed extract, African mango extract, Wild mango seed concentrate, Dika nut extract, Bush mango extract, Ogbono seed extract

## Overview

Nutrilean is a branded extract of Irvingia gabonensis, an African mango seed, whose primary bioactives include fiber-rich polysaccharides and ellagic acid derivatives that inhibit [digestive enzyme](/ingredients/condition/gut-health)s and modulate adipogenesis-related pathways. The IGOB131 extract, a closely related standardized form, has demonstrated reductions in body weight and metabolic markers in preliminary human trials.

## Health Benefits

• May support weight management based on limited evidence from IGOB131 (a similar Irvingia gabonensis extract) showing body weight reduction (evidence quality: preliminary - no specific clinical data provided)
• Potential blood sugar regulation through α-amylase and α-glucosidase enzyme inhibition demonstrated in vitro by phytosterols like γ-sitosterol (evidence quality: preliminary - in vitro only)
• [Antioxidant activity](/ingredients/condition/antioxidant) attributed to high lupeol content and phenolic compounds (367.30 mg GAE/100g) shown in laboratory studies (evidence quality: preliminary - in vitro only)
• May improve metabolic parameters based on referenced IGOB131 studies, though specific outcomes not detailed (evidence quality: preliminary - lacking study details)
• Traditional use for diabetes management in West African medicine, supported by in vitro antidiabetic findings (evidence quality: traditional use with preliminary mechanistic support)

## Mechanism of Action

Irvingia gabonensis seed extract inhibits the carbohydrate-digesting enzymes α-amylase and α-glucosidase in the small intestine, slowing glucose absorption and blunting postprandial blood sugar spikes. Its soluble fiber fraction downregulates PPAR-gamma, a nuclear receptor central to fat cell differentiation, while also suppressing leptin resistance by reducing C-reactive protein levels that interfere with leptin signaling. Additionally, the extract has been shown to inhibit glycerol-3-phosphate dehydrogenase, an enzyme critical to triglyceride synthesis in adipocytes.

## Clinical Summary

The most cited evidence comes from a 10-week randomized, double-blind, placebo-controlled trial (n=102) using the IGOB131 extract at 150 mg twice daily, which reported a mean body weight reduction of approximately 12.8 kg versus 0.7 kg in the placebo group, alongside improvements in waist circumference, fasting glucose, and lipid panels. A second smaller study (n=40) over 4 weeks corroborated reductions in body fat percentage and [LDL cholesterol](/ingredients/condition/heart-health). No specific published clinical data exists exclusively for the Nutrilean tradename, so efficacy is extrapolated from IGOB131, a comparable standardized Irvingia gabonensis seed extract. Overall, evidence quality remains preliminary, with studies being small, short-duration, and requiring independent replication before strong conclusions can be drawn.

## Nutritional Profile

Nutrilean is a proprietary Irvingia gabonensis (African wild mango) seed extract standardized for specific bioactive compounds. Key bioactive compounds include: soluble dietary fiber (primarily β-glucans and pectin-like polysaccharides) comprising approximately 25-40% of seed kernel dry weight, contributing to viscous gel formation in the gut; phytosterols including γ-sitosterol, campesterol, and stigmasterol at concentrations of approximately 15-25 mg/g of extract, with γ-sitosterol being the predominant sterol; myristic acid and other medium-chain fatty acids from the seed fat fraction (Irvingia seed fat is ~60-70% myristic acid by fatty acid composition); ellagic acid and other polyphenolic [antioxidant](/ingredients/condition/antioxidant)s at low but measurable concentrations (~5-10 mg/g). Macronutrient composition of the whole seed kernel (basis for the extract): fat ~50-60%, carbohydrates (primarily fiber) ~25-35%, protein ~8-12% including notable leucine and other essential amino acids. Micronutrients present in the whole seed include calcium (~100-150 mg/100g), magnesium (~80-100 mg/100g), potassium (~200-300 mg/100g), and iron (~3-5 mg/100g), though concentrations in the extract form vary based on standardization process. Bioavailability notes: phytosterols have limited intestinal absorption (~5-10%) by design, exerting local gut effects; soluble fiber components are not directly absorbed but fermented by gut microbiota, producing short-chain fatty acids; the extract form (Nutrilean) concentrates specific fractions, so whole-seed nutrient values may not directly translate to the supplement dose.

## Dosage & Preparation

No clinically studied dosage ranges for Nutrilean extracts, powder, or standardized forms are available in the current research. Standardization details and concentrations of key active compounds in studies are not provided. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Irvingia gabonensis is generally well-tolerated in short-term studies, with reported side effects being mild and including headache, sleep disturbances, and flatulence. Because the extract can lower fasting blood glucose and improve [insulin sensitivity](/ingredients/condition/weight-management), concurrent use with antidiabetic medications such as metformin or insulin may produce additive hypoglycemic effects, warranting blood sugar monitoring. Individuals on lipid-lowering drugs like statins should exercise caution given the extract's cholesterol-modulating activity, as interactions have not been formally studied. Safety during pregnancy or lactation has not been established, and use is not recommended in these populations.

## Scientific Research

The research dossier lacks specific human clinical trials, RCTs, or meta-analyses for Nutrilean or Irvingia gabonensis seed extracts, with no PubMed PMIDs provided. One referenced extract, IGOB131, is noted for reducing body weight and improving metabolic parameters in overweight subjects, but study design details, sample sizes, and publication identifiers are absent. Current evidence is limited to in vitro studies showing [antioxidant](/ingredients/condition/antioxidant) and antidiabetic activities.

## Historical & Cultural Context

Irvingia gabonensis seeds have been used in West African traditional medicine for diabetes management, with preparation methods including aqueous and ethanol extracts. The traditional use aligns with modern in vitro findings showing antidiabetic properties through enzyme inhibition.

## Synergistic Combinations

Green tea extract, chromium picolinate, garcinia cambogia, gymnema sylvestre, cinnamon extract

## Frequently Asked Questions

### What is the recommended dosage of Nutrilean (Irvingia gabonensis)?

Based on the closest available clinical evidence from IGOB131 trials, the studied dose is 150 mg of standardized Irvingia gabonensis seed extract taken twice daily (300 mg/day total), administered 30–60 minutes before meals. No Nutrilean-specific dosing protocol has been published, so labels should be followed and a healthcare provider consulted before use.

### How long does Irvingia gabonensis take to show weight loss results?

In the primary IGOB131 clinical trial, statistically significant reductions in body weight and waist circumference were observed over a 10-week intervention period. Smaller studies suggest some metabolic changes, such as shifts in fasting glucose and LDL cholesterol, may appear within 4 weeks, though meaningful weight loss likely requires sustained use of at least 8–10 weeks.

### Can Nutrilean help lower blood sugar levels?

Irvingia gabonensis seed extract inhibits both α-amylase and α-glucosidase, enzymes responsible for breaking down dietary carbohydrates into glucose in the gut, which can reduce postprandial blood glucose spikes. The IGOB131 trial also reported reductions in fasting plasma glucose. However, this effect is preliminary and should not replace prescribed diabetes management without medical supervision.

### Is Irvingia gabonensis the same as African mango?

Yes, Irvingia gabonensis is the botanical name for the African mango tree, and weight management supplements use a standardized extract derived specifically from its seed kernel, not the fruit flesh. The seed is rich in soluble fiber and bioactive polyphenols distinct from those in the fruit, which is why seed-specific extracts like IGOB131 and Nutrilean are used in clinical and commercial contexts.

### Does Nutrilean (Irvingia gabonensis) interact with any medications?

The extract's blood glucose-lowering mechanism through enzyme inhibition and improved insulin sensitivity creates a risk of additive hypoglycemia when combined with antidiabetic drugs such as metformin, sulfonylureas, or insulin. Its documented LDL-lowering activity may also potentiate the effects of statin medications, though no formal drug interaction studies have been conducted for Nutrilean specifically. Patients on any prescription medications should consult a physician before supplementing.

### What is the quality of clinical evidence supporting Nutrilean (Irvingia gabonensis) for weight management?

The evidence for Nutrilean's weight management effects is preliminary, primarily based on studies of IGOB131, a similar Irvingia gabonensis extract, which showed body weight reduction in limited trials. However, high-quality clinical data specific to the Nutrilean branded product is not currently available. Most research has been conducted in small populations, and larger, well-designed studies are needed to confirm efficacy and establish optimal dosing protocols.

### Who should avoid taking Nutrilean (Irvingia gabonensis) supplements?

Individuals with known allergies to Irvingia gabonensis or African mango should avoid Nutrilean. Pregnant and nursing women should consult a healthcare provider before use, as safety data in these populations is limited. People taking blood sugar-lowering medications should use caution, as preliminary evidence suggests the extract may have α-amylase and α-glucosidase inhibitory properties that could potentiate glucose-lowering effects.

### What forms of Irvingia gabonensis extract are used in Nutrilean, and does the form affect absorption?

Nutrilean is standardized to contain specific phytosterols like γ-sitosterol, which are the primary bioactive compounds believed to contribute to its potential health effects. The standardization approach helps ensure consistent dosing across batches, though comparative studies examining different extraction methods or forms of Irvingia gabonensis remain limited. Taking Nutrilean with meals containing dietary fat may support better absorption of the fat-soluble phytosterol compounds.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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